I will develop custom esp32, stm32 and arduino firmware for your embedded device

I write reliable, maintainable firmware for ESP32 (ESP-IDF / Arduino), STM32 (including F103), RP2040 and nRF52 - peripheral drivers straight from the datasheet, FreeRTOS, BLE, MQTT, LoRa and OTA updates. I run my own IoT devices in production, so I build firmware that survives real-world conditions, not just a demo on the bench.

What I can do for you: firmware from scratch or on top of your existing code · peripheral drivers from the datasheet (I2C, SPI, UART, ADC, PWM, sensors) · BLE, WiFi, MQTT and LoRa connectivity · FreeRTOS tasks, interrupts, DMA and low-power design · OTA update support · porting firmware between MCU families (e.g. Arduino to ESP-IDF or STM32 HAL) · debugging and fixing firmware that misbehaves.

These packages cover a single driver, one finished module, or one bounded integration - a clean entry point, not an entire product. Larger or full custom work is quoted individually: message me with your MCU, peripherals and what the device must do, and I'll give you a fixed price.